Deflection coil assembly

ABSTRACT

A deflection coil assembly having two pairs of saddle coils between which a flared insulating body having a flange at its narrow end is provided, said flange being provided with circumferential grooves in which connecting wires extend from the coils to the connecting plates secured to the flange.

United States Patent [191 Van Der Heijde et al.

DEFLECTION COIL ASSEMBLY Inventors: Martin Clemens Van Der Heiide;

Adriaan Jacob Groothoff, both of Emmasingel, Eindhoven,

Netherlands Assignee: U.S. Philips Corporation, New York,

Filed: Sept. 9, 1971 Appl. No.: 179,127

Foreign Application Priority Data Sept. 12, 1970 Netherlands 7013513 U.S. Cl 335/210, 317/101 CC Int. Cl. H0lf 7/00 Field of Search 335/210, 213;

[451 Sept. 25, 1973 [56] References Cited UNITED STATES PATENTS 3,469,218 9/1969 Foladz 335/210 3,390,363 6/1968 Weyrich et al. 3,496,501 2/1970 Harten et al 313/313 X Primary Examiner-George Harris Att0rneyFrank R. Trifari [57] ABSTRACT A deflection coil assembly having two pairs of saddle coils between which a flared insulating body having a flange at its narrow end is provided, said flange being provided with circumferential grooves in which connecting wires extend from the coils to the connecting plates secured to the flange.

7 Claims, 2 Drawing Figures Patented Sept. 25, 1973 3,761,849

INVENTORS MARTIN C. VAN DER HEIJDE ADRIAAN J. GROOTHOFF gkmz A;

AGENT r 1 DEFLECTION COIL ASSEMBLY This invention relates to a deflection coil assembly for a display tube, in particular for color television, having two pairs of saddle coils between which is provided a fittings flared insulating body of synthetic resin having a flange at its narrow end, at least one connecting plate being secured to the said flange.

In a known embodiment (U.S. Pat. No. 3,469,218) the flange is provided with an outward directed raised edge and forms a flat box which can be closed by means of a lid, said box accommodating besides both small line coil ends two connecting plates and the connecting wires from the deflection coils to these plates. In order to prevent the axial dimension of the coil unit which is already large, particularly in color television, from becoming larger yet, the connecting plates are situated in inward projecting axial recesses (cavities) of the flange.

The wires which extend rather at random through the box generally have to be provided with an insulating sleeve both for reasons of insulation and to prevent damage, and they have to be secured, for example, by meansof adhesive tape, thus causing additional process steps. Moreover, the box has to offer sufficient room in the axial direction for accommodating the wires provided with an insulating sleeve; consequently, the box generally has to extend beyond the line coil ends, thus increasing the axial dimension of the coil assembly. The invention has for its object to eliminate these drawbacks.

The invention is characterized in that the flange is provided with circumferential grooves in which connecting wires extend from the coils to the connecting plate. The grooves offer adequate insulation and protection of the wires and, moreover, fix the course of said wires to a large extent. Almost all wires extend along the flange edge and the axial dimension of the coil assembly need .not be larger than that of the pair of line coils.

The accompanying drawing shows a plan view (FIG. I) and a rear view (FIG. 2) of an embodiment.

The deflection coil assembly shown comprises'a pair of normal saddle coils for the frame deflection having coil ends (coil flanges) I and 3, and a pair of saddle coils for the line deflection having coil ends 5 and 7; the assembly is surrounded in the usual manner by a yoke ring 9 of ferrite. Between the two pairs of coils is situated a thin-walled, flared insulating body II of synthetic resin, a flange 13 being formed at the narrow end (upper end in FIG. I) of said body whilst a flange I5 is provided at the wide end. Both flanges have the shape of an outward-facing shallow container, the coil ends 7 and 5 being situated in said containers. The insulating body 11, I3 consists of two halves which are separated according to a verticalplane through the axis.

7 The flange I3 is provided with circumferential grooves 17, in which connecting wires 19 i.e., leadouts of the coil windings extend from the coil ends 3 and 7 to two diametrically opposite, insulating connecting plates 21 (one of the two is omitted in FIG. 2). Each of these plates is secured to the edge of the flange I3 by means of two hooks 23 which are formed at the inner side of the flange I3 (the side facing the flange at both sides of the separating plane, said hooks being directed away from each other and inserted through apertures 25 of the relevant plate 211. The connecting plates 21 preferably also serve for keeping the two halves of the flange 13 together. As appears from FIG. 1, the connecting plate shown is situated within theaxial space between both flanges l3 and 115. The wires I9 extend to connecting contacts 27 which are bent according to the shape of a U and which in known manner are secured on the plate 21 by means of bent bottom portions 29. A protecting ring 31 of resilient synthetic resin is preferably fitted around the edge of the flange 13 thus covering at least partly the grooves 17 (ring omitted in the left-hand half of the drawing for the sake of'clarity). To a large extent this ring has a chute-shaped axial section and can be slid onto the flange I3 in the axial direction (in FIG. 1 from the top downwards). Axial tags 33, being resilient in the radially inward direction and having a cam 35 engaging below the edge of the flange 113 (see FIG. 2), prevent the ring 311 from being pulled back.

As a result, this ring is firmly anchored to the flange I3, and can also serve as a support for a plurality (i.e., four, two of which are visible in FIG. 2) of radial bolts 37 which serve in known manner for securing the deflection coil unit in a supportingcage 39 (two portions thereof are shown in FIG. 2) in an axially slidable manner, said cage being provided with known means for securing it on the neck of the display tube. The cage 39 is provided with axial grooves 411 in which the bolts 37 can be secured in the desired axial position of the deflection coil assembly by means of wing-nuts 43. The heads of the radial bolts 37 are secured in protrusions 45 formed on the ring M, the ends of the said protrusions being mutually connected by a formed-on second ring d7 tor the sake of rigidity.

If no separate supporting cage is used, the ring 31 may be provided with a clamping device instead of the protrusions 45 and the bolts 37 for securing the ring on the neck ofthe tube. In that case the ring can form the edge of a round plate which is provided in known manner with a central aperture for allowing the neck of the tube to pass, and also with a clamping device surrounding this aperture.

In the described embodiment the circumferential grooves 17 are formed in the cylindrical outer surface of the edge of the flange 13. In principle, however, it is alternatively possible to provide these grooves in the side face of the said edge which is visible at the lefthand side in FIG. 2.

It is obvious that in the described construction the flange edge need not extend beyond the coil ends 7 in the axial direction. The wires 19 are situated in the grooves I7 such that they are insulated and mechanically protected, and they are properly anchored in said grooves preferably by means of hooks d9 formed in the side-waIls of the grooves. This makes the use of insulating sleeves superfluous.

What is claimed is:

I. A deflection coil assembly comprising a pair of deflection coils each having a plurality of wire leads, a flaired insulating body disposed between said coils and having broad and narrow ends, a flange disposed on said body at said narrow end, means for insulating and preventing damage to said wire leads comprising grooves circumferentially defined in said flange and adapted to receive said leads, a support secured to said flange and extending beyond said grooves, and at least one terminal board mounted on said support and adapted to receive said leads.

2. As assembly as claimed in claim 1 wherein said body comprises two sections, said support comprises two pairs of hooks disposed on said sections near said flange, respectively, each of said hooks being directed away from the other hook in the same pair, and means for securing said sections together comprising a pair of said terminal boards disposed between said hook pairs respectively.

3. An assembly as claimed in claim I further comprising a protecting ring means disposed about said flange for at least partially enclosing said grooves.

4. An assembly as claimed in claim 3 further comprising a plurality of radially extending bolts secured to said ring, and a supporting cage secured to said bolts in an axially slidable manner.

5. A deflection coil assembly comprising a pair of deflection coils each having a plurality of wire leads, a

flaired insulating body comprising two sections disposed between said coils, each of said sections having broad and narrow ends, a flange disposed on said sections at said narrow ends, means for insulating and preventing damage to said wire leads comprising grooves circumferentially defined in said flange and adapted to receive said leads, two pairs of books dispoed on said sections near said flange, respectively, and extending beyond said grooves, each of said hooks being directed away from the other hook in the same pair, and means for securing said sections together comprising a pair of terminal boards disposed between said hook pairs respectively and adapted to receive said leads.

6. An assembly as claimed in claim 5 further comprising a protecting ring means disposed about said flange for at least partially enclosing said grooves.

7. An assembly as claimed in claim 6 further comprising a plurality of radially extending bolts secured to said ring, and a supporting cage secured to said bolts in an axially slidable manner. 

1. A deflection coil assembly comprising a pair of deflection coils each having a plurality of wire leads, a flaired insulating body disposed between said coils and having broad and narrow ends, a flange disposed on said body at said narrow end, means for insulating and preventing damage to said wire leads comprising grooves circumferentially defined in said flange and adapted to receive said leads, a support secured to said flange and extending beyond said grooves, and at least one terminal board mounted on said support and adapted to receive said leads.
 2. As assembly as claimed in claim 1 wherein said body comprises two sections, said support comprises two pairs of hooks disposed on said sections near said flange, respectively, each of said hooks being directed Away from the other hook in the same pair, and means for securing said sections together comprising a pair of said terminal boards disposed between said hook pairs respectively.
 3. An assembly as claimed in claim 1 further comprising a protecting ring means disposed about said flange for at least partially enclosing said grooves.
 4. An assembly as claimed in claim 3 further comprising a plurality of radially extending bolts secured to said ring, and a supporting cage secured to said bolts in an axially slidable manner.
 5. A deflection coil assembly comprising a pair of deflection coils each having a plurality of wire leads, a flaired insulating body comprising two sections disposed between said coils, each of said sections having broad and narrow ends, a flange disposed on said sections at said narrow ends, means for insulating and preventing damage to said wire leads comprising grooves circumferentially defined in said flange and adapted to receive said leads, two pairs of hooks dispoed on said sections near said flange, respectively, and extending beyond said grooves, each of said hooks being directed away from the other hook in the same pair, and means for securing said sections together comprising a pair of terminal boards disposed between said hook pairs respectively and adapted to receive said leads.
 6. An assembly as claimed in claim 5 further comprising a protecting ring means disposed about said flange for at least partially enclosing said grooves.
 7. An assembly as claimed in claim 6 further comprising a plurality of radially extending bolts secured to said ring, and a supporting cage secured to said bolts in an axially slidable manner. 